Connection for bit-brace bows.



E. A. SGHADE. CONNECTION-FOB. BIT BRAGE BOWS.

APPLICATION FILED 11111317, 1910.

9181,69 3. Patented Jan. 17, 1911.

UNI SATS ATN IQE.

EDMUND A. SCI-IADE, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE STANLEY RULE & LEVEL COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

CONNECTION FOR BIT-BRACE BOWS.

Patented Jan. 17, 1911.

Application filed June 17, 1910. Serial No. 567,378.

To all whom it may concern:

Be it known that I, EDMUND A. SCHADE, a citizen of the United States, residing at New Britain, county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Connections for Bit- Brace Bows, of which the following is a full, clear, and exact description.

My invention relates to improvements in bit braces, the object of the invention being to provide a simple and efiective connection between the bow and the chuck head. In devices of this character, particularly where concealed ratchet mechanism is employed, it is frequently necessary to connect the bow to the chuck head at a point eccentric to the axis of the chuck. In such cases a very substantial twisting strain occurs at said point of connection, which too frequently loosens the same, and renders the tool unfit for use. Again, in some instances, it becomes desirable to replace the bows. This involves separation of the parts, and in the constructions heretofore employed, much difficulty is found in making the disconnection. By my improvements the parts may be readily connected and disconnected, and yet when assembled and secured in place are bound together with the greatest rigidity.

In the accompanying drawings, Figure 1 is a side elevation partly in section of the chuck portion of a bit brace and so much of the bow portion thereof as is necessary for the purpose of illustration; Fig. 2 is a plan view of the end of the bit brace bow shown in Fig. 1; Figs. 3 and 4 are detail views.

1 represents the chuck of a bit brace.

2 represents the ratchet head which extends laterally from the chuck portion 1 and is provided with the tubular or sleeve-like extension 3.

41 represents the lower end of a bit brace bow, the extremity of which is tapered as at 1 Fig. 2.

5 is, a split sleeve having a cylindrical outer wall and a tapered inner wall, the outer wall being adapted to slip into the bore of the tubular extension 3, the inner,

wall being tapered to correspond with the tapered end 1 of the bow 1, so as to properly receive the same.

6 is a shoulder on the outer end of the split sleeve 5 to prevent the sleeve 5 from .entering the tubular extension 3 beyond a certain point.

7 is a tapered pin. The tubular extension 3, the split sleeve 5 and the tapered end 1 of the bow are provided with tapered passages arranged to receive the tapered pin 7 The parts are so fitted that when the split sleeve 5 is in place in the tubular extension 3, the bow 4. may be forced nearly into place without the assistance of the tapered pin 7 hen this is done, the tapered pin 7 may be inserted by the fingers partially into the pin passage, following which, it may be driven in, said driving in action drawing the tapered end of the bow into the split sleeve 5, the taper of the bow expanding the latter until it grips the bow end and the surrounding wall of .the sleeve like extension 3 with such exceeding firmness as to guarantee against the possibility of loosening up by reason of the twisting strain to which said connection is subjected. The wedging action of the split sleeve coacting with the pin 7 and supplementing the latter in the act of holding the bow firmly within the chuck head What I claim is:

1. In a bit brace, a chuck, a head therefor having a lateral tubular extension having a cylindrical bore, a bow having a tapered end arranged to enter said'tubular extension, a split sleeve interposed between the tapered end of the bow and the tubular extension of said head, said sleeve having a cylindrical exterior and a tapered bore, a tapered crosspassage through all of said parts, and a tapered pin arranged in said last mentioned passage.

2. In a bit brace, a chuck, a head therefor having a lateral tubular extension having a cylindrical bore, a bow having a tapered end arranged to enter said tubular extenmentioned passage, and a shoulder at the slon, a split sleeve interposed between the outer end of said split sleeve.

tapered end of the bow and the tubular extension of said head, said sleeve having a EDMUND Q 5 cylindrical exterior and a tapered bore a WVitnesses:

tapered cross-passage through all of said W. J. WORAM,

parts, a tapered pin arranged in said last H. S. WALTER. 

